Don't worry, OP. I felt the same way.
Picked froakie, decided to use torchic, and I really wanted charmander (squirtle as a close second). Ended up with bulba due to typing and wow this fucker is 2 OP
Just switch your mons up in the post game and create different teams like the elite 4 often did. Ex. I have a tyrantrum atm and it's great in-game but I'm planning on replacing it with a salamence/garchomp before I fight the elite 4.
